Lubricator



FIG. 1 is a front, top and left side perspective view of a lubricator showing our new design;

FIG. 2 is a rear, bottom and right side perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a left side view thereof;

FIG. 8 is a right side view thereof; and,

FIG. 9 is a partial cross sectional view taken along the line 9-9 of FIG. 5.

The broken lines depict portions of the lubricator that form no part of the claimed design. 

CLAIM The ornamental design for a lubricator, as shown and described. 